VOA慢速英语2012.11.09 的, 英语, document, studying, control, 的, 英语, document, studying, control

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Researchers are studying the use of mobile phones to document the spread of malaria. The study is part of an effort to stop or control the disease. The World Health Organization says malaria mortality rates have fallen by twenty-five percent since two thousand. 研究者正在研究使用手机来记录疟疾的传播,这项研究是努力尝试终结或控制该疾病的一部分.世卫组织称2000年以来疟疾的死亡率下降了25%.
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